Jacob green



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.TO ALL WHOM IT MAY CONCERN:

Bc it known that IVJACOB GREEN, of Norristown, Montgomery county, Pennsylvania, have invented an Improved Glass Furnace; and I do hereby declare thc following to be a'full, clear, and exact description ot' the same, reference being had to the accompanying drawing, and to the letters of reference marked thereon.

My invention consists of a glass furnace constructed and combined with certain blast and steam pipes, in the peculiar manner fully described hereafter, with the view of economzing fuel, and so thoroughly heating the pots or crucibles that the cheap sulphate of soda .may be used instead ot' carbonate of soda, and the combination of deleterious products of combustion with the glass prevented.

" In order to enable others skilled in the art to Snake and use my invention, I will now proceed to describe its construction and operation, reference being had .to the accompanying drawing which forms a part of this specification, and in whichp Figure I lis a sectional elevation of my improved glass furnace.

Figure 2, a front elevation.

Figure, a sectional elevation on the line 1 2, iig. 1.

Figurezl, a sectional plan on the line 3-4, iig. 2.

A is the front, A the back and B and B the two side walls of the furnace, and C (lig. 3) is the arched top. At thc lower portion of the furnace is formed an ash-pit or cav`e," I, and above the latter is a siege" or door, a', in which, adjacent to thc front wall A, is sunk a fireplace, E.' In the front wall, directly opposite the lire-place, an opening, b, of such a size as to admit the pots F, the latter standing on the siege; near the walls of thenfurnaee, as shown in iig. 1. An air pipe, G, communicates with a chamber formed in front of the furnacefatthe edges of the opening` b, and in the front wall A are openings c, through which the air can pass lfrom the said chamber into the furnace, the openings being so inclined as to direct the streams of air towards the {ire-place E. Into the ash-pit projects an air pipe, G', and a steam pipe, H, each of which, as well as4 the air pipe G, is provided with a suitable stopfvalve, e. The steam pipe II may extend round the ash-pit near its roof, and may be perforated so as to insure a thorough dissemination of the steam. To the opening b is tted a slab, d, and in the wall A, beneath the {ire-place, is the ash-pit openingf, which is closed by a suitable door.

To the working holes h in the sides of the furnace are tted Stoppers, in such a manner as not to entirely close the holes. i When the re'has been. kindled and the materials for making the glass have been introduced into the pots, the openings h audf are nearly closed, and steam ispermitted to pass through .the pipe H and air through the pipes G and G. The air which passes through the openings e is so directed towards the tire-place that the heated products of combustion lare caused rst to circulate round the pots F and then to pass over the pots towards thc exit openings 72.. 'Ihe heat which iu ordinary furnaces is wasted by being directed mainly to the topof the same, is thus employed in melting the glass, while the formation of tcars" (which are occasioned by the melting of portions of the top of the furnace, and which drop into and injure the glass) is prevented. By the introduction of air :and steam below thc fire-place, and by directing the blasts of air among the products of combustionbefore the latter pass over the pots, thc carbon or any gaseous products of combustion are consumed before they can bc brought in contact and combine with the materials in the pots. The combination of injurb ous matter with the glass is thus prevented. As the exit openings are of limited dimensions, al constantr pressi r ure'is maintained within the furnace, und any strong outward draught is avoided, the gases being thus retained within the furnace until thoroughly consumed, instead of being dscharged'wth the heat to the stuck, as in furA naces oi' the ordinary construction.

I have found that by the use of a furnace of the above dcseriptionIam enabled, with about one-half the fuel required in ordinary furnaces, to obtain such a heat that the cheap sulphate of soda may be substituted for the more expensive carbonate of sodagenerally employed in the manufacture et' glass on account of its fusibility4 I prefer the form of furnace described on account of its simplicity, but there may betwo ire-places, one at each end ci' the furnace, and any desired number of pots may be used. It is important for manyv reasons that the ash-pit or careI should be ot' large dimensions. In order to accomplish this end I form on the top the arched root' ,si the kur ot' which consists of a east-iron frame, j, the latter serving to supportr the grate-bars t, which t, can bc cleaned from below by an operator who has gained access to the enlarged ash-pit or cavie for ythe purpose- As this arrangement is applicable to other furnaces, and as it forms the subject for a separate application for a patent, further allusion to it here will be unnecessary.

I claim as my invention, and desire to secure by Letters Patent- 1. Snbjcetng the materials of which glass is to be formel1 te the action of the products of. combustion under air pressure by blast within a furnace, as set forth.

2. The combination of a glass furnace with pipes so arranged that blasts of air and steam can be introduced among the products of combustion before the latter are brought into contact with the contents ef the potsor crucibles for the purpose specified.'

3. The. combination with a glass furnace oi' a blast pipe and openings, so arranged as te direct the ptoducts of combustion around the pots, substantially as set forth.

4. The within-described furnace, consisting of the walls A A B B', with their openings, the top siege d, anri re-place E,'tl1e whole being constructed and arranged as described.

In testimony whereof I have signed my naine to this specication in the presence 0i' two subscribing witnesses.

JAC/0B GREEN.

Witnesses CHARLES E. Fos'rnn, W. J. R.. DELAXY. 

